[Coco] Climax C Compiler setup

[James Jones]

CP/M only tracked file sizes in sectors, not bytes, so the convention there
for text files was to place a ^Z after the last text character. OS-9, like
most other operating systems, actually keeps track of the file length in
bytes separately from the space allocated for it in the file system
containing it; so no "EOF" character is needed.

The ANSI standard comes out and says that the file as processed by a
preprocessor (or "preprocessor stage", so it may or may not be a separate
program) consists of a sequence of lines, and also a "translation unit"
(one source file after preprocessing) is a sequence of one or more external
declarations, so a valid ANSI/ISO C file can't be empty or even just
comments.